Simon expansion-bomb helium liquefier525 Six3 Size of molecules860 Slater735736 smith465 Smith and Menzies451453 Smoluchowski185199200215216 Smyth141144 Smythe208 Snock front841 Snock front, Mach number842 Snock front, tube840 Soddy215 Solar constant691 Solidification of helium526 Solids, amorphous, melting point of446 Solids, conductivity ofsee "Conductivity" Solids, expansion545see Solids, fusion of442 Solids, fusion of, latent heat ofsee "Latent heat" Solids, radiation from677 Solution, boiling point of459 Solution, vapour pressure of459 Sommerfeld594718739754 Soret180 Soret effect180 Sosman43 Sound, velocity of98 Specific beat of gases, measurement of, at constant pressure83—89 Specific beat of gases, measurement of, at constant pressure, by Henry using a modified constant flow method89 Specific beat of gases, measurement of, at constant pressure, by Regnault83 Specific beat of gases, measurement of, at constant pressure, by Scheel and Heuse87 Specific beat of gases, measurement of, at constant volume89—92 Specific beat of gases, measurement of, at constant volume, by explosion method90 Specific beat of gases, measurement of, at constant volume, by Joly's steam calorimeter61—6490 Specific beat of gases, measurement of, at constant volume, by Nernst vacuum calorimeter7292 Specific beat of gases, measurement of, at high pressure87 Specific beat of gases, measurement of, at high temperature8690100 Specific beat of gases, measurement of, at low temperature104 Specific beat of gases, measurement of, ratio of the two92see Specific beat of gases, measurement of, table of105 Specific heat at constant pressure79 Specific heat at constant pressure, variation of, with pressure334 Specific heat at constant volume79 Specific heat at constant volume, variation of, with volume333 Specific heat for a gas80 Specific heat of chlorine723 Specific heat of gases, theoretical calculation of, for diatomic molecules703715 Specific heat of gases, theoretical calculation of, for diatomic molecules, contribution of rotational energy to711 Specific heat of gases, theoretical calculation of, for diatomic molecules, contribution of vibrational energy to721 Specific heat of gases, theoretical calculation of, for hydrogen715 Specific heat of gases, theoretical calculation of, for monatomic molecules703 Specific heat of gases, theoretical calculation of, for polyatomic molecules153730723 Specific heat of hydrogen706714—715 Specific heat of liquids57742 Specific heat of liquids, by continuous-flow method67 Specific heat of liquids, by continuous-mixture method57 Specific heat of liquids, by electrical method64 Specific heat of liquids, by method of cooling58 Specific heat of liquids, by method of mixtures51 Specific heat of liquids, table of742 Specific heat of metals at high temperatures54 Specific heat of methane740 Specific heat of nickel739 Specific heat of poor conductors74 Specific heat of saturated vapour470 Specific heat of silver, at low temperatures725 Specific heat of solids, measurement of, at high temperatures5375 Specific heat of solids, measurement of, at low temperature5372 Specific heat of solids, measurement of, by Bunsen ice calorimeter59 Specific heat of solids, measurement of, by electrical method64 Specific heat of solids, measurement of, by heating by cathode rays76 Specific heat of solids, measurement of, by Joly's steam calorimeter61—64 Specific heat of solids, measurement of, by method of mixtures51—57 Specific heat of solids, measurement of, by Nernst vacuum calorimeter72 Specific heat of solids, measurement of, results of experiments77 Specific heat of solids, theoretical calculation of, at high temperatures737 Specific heat of solids, theoretical calculation of, from kinetic theory153 Specific heat of solids, theoretical calculation of, from quantum theory, by Born and Karman736 Specific heat of solids, theoretical calculation of, from quantum theory, by Debye727see Specific heat of solids, theoretical calculation of, from quantum theory, by Einstein726 Specific heat of water at different temperatures70 Specific heat, definition of50 Specific heat, difference between the two, for any stance331 Specific heat, electronic738 Specific heat, importance of investigations on737 Specific heat, mean50 Specific heat, methods of measurements of50 Specific heat, negative470 Specific heat, ratio of the two92297 Specific heat, theory of, kinetic151—154 Specific heat, theory of, quantum726 Specific heat, true, at a single temperature50 Spectral line, distribution of energy in658 Spectral line, finite breadth of, Maxwell's law from855 Spectral pyrometerssee "Optical pyrometers" Spectrum of stars699 Spectrum, band, of HBr720 Spectrum, continuity of619 Spectrum, different regions of, description, detection and discovery of621622 Spectrum, emitted by a black body, distribution of energy in655 Spectrum, molecular, nuclear spin from874 Spectrum, rotational, of HCl molecule710 Spherically symmetrical atoms759 Spin quantum number of the nucleus717 Spin, nuclear, from molecular spectra874 Spotz172 Srivastava816828831918 Starck794801 Stars, classification of699 Stars, radiation from699 Stars, temperature of700 State, change of442 State, change of, thermodynamic, treatment of352 Stationary waves663 Statistical thermodynamics371 Statistical thermodynamics, new methods in744 Statistics for strongly degenerate F.D. systems753 Statistics for weakly degenerate systems751 Statistics for weakly degenerate systems, application of, to helium752 Statistics for weakly degenerate systems, experimental tests of752 Statistics, Bose, of photons747 Statistics, Bose, of photons, application of, to liq. He II756 Statistics, Bose, of photons, extension of, by Einstein to matter756—758 Statistics, Bose, of photons, extension of, by Einstein to matter, calculation of entropy from750 Statistics, Bose, of photons, extension of, by Einstein to matter, calculation of pressure and energy from750 Statistics, Bose, of photons, extension of, by Einstein to matter, calculation of probability from746 Statistics, classical (Maxwell — Boltzmann)371749 Statistics, deductions from the three747—755 Statistics, difference between classical and Bose — Einstein746747 Statistics, Fermi — Dirac747 Statistics, Fermi — Dirac, calculation of entropy from750 Statistics, Fermi — Dirac, calculation of pressure and energy from750 Statistics, Fermi — Dirac, calculation of probability from747 Statistics, method of Darwin and Fowler893 Statistics, method of Darwin and Fowler, new744 Statistics, method of Darwin and Fowler, relation of, to wave mechanics879 Statistics, quantum744 Statistics, quantum, calculation of entropy from750 Statistics, quantum, calculation of other thermodynamical functions from750 Steady state577 Steady-flow electric calorimeter67 Steam calorimeter (Joly)61 Steam calorimeter (Joly), differential62 Steam engine226 Steam engine, compound28 Steam engine, efficiency of228250 Steam engine, indicator diagram of250 Steam engine, main parts of226 Steam engine, performance of actual249